BRPI0410013A - método e aparelho para sincronizar um sinal de modulação com múltiplos nìveis - Google Patents
método e aparelho para sincronizar um sinal de modulação com múltiplos nìveisInfo
- Publication number
- BRPI0410013A BRPI0410013A BRPI0410013-1A BRPI0410013A BRPI0410013A BR PI0410013 A BRPI0410013 A BR PI0410013A BR PI0410013 A BRPI0410013 A BR PI0410013A BR PI0410013 A BRPI0410013 A BR PI0410013A
- Authority
- BR
- Brazil
- Prior art keywords
- shorter
- block
- lower layer
- data
- ldpc
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Quality & Reliability (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Radio Relay Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Error Detection And Correction (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
"MéTODO E APARELHO PARA SINCRONIZAR UM SINAL DE MODULAçãO COM MúLTIPLOS NìVEIS". Trata-se de um sistema de comunicações por satélite que compreende um transmissor, um transponder de satélite e um receptor. O transmissor transmite um sinal modulado com múltiplos níveis de enlace ascendente (modulação hierárquica, modulação em camadas, etc.) para o transponder de satélite, o qual difunde o enlace ascendente do sinal modulado com múltiplos níveis para um ou mais receptores. O sinal modulado com múltiplos níveis compreende uma camada superior e uma camada inferior. A camada inferior conduz blocos LDPC, ou quadros LDPC, cada bloco LDPC compreendendo S bits de dados incluindo uma parte de cabeçalho e uma parte portadora de dados. A camada superior conduz blocos mais curtos, cada bloco mais curto compreendendo R bits de dados, onde R < S, o bloco mais curto também compreendendo uma parte de cabeçalho e uma parte portadora de dados. O transmissor sincroniza o início da transmissão de cada bloco LDPC com o início da transmissão de um bloco mais curto. O receptor utiliza os blocos mais curtos recebidos para ajudar na busca por dados particulares na parte de camada inferior do sinal modulado com múltiplos níveis recebido. Em particular, o receptor busca por dados de sincronização na parte de camada inferior do sinal recebido quando da detecção da parte de cabeçalho em um bloco mais curto recebido.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46794603P | 2003-05-05 | 2003-05-05 | |
PCT/US2004/013647 WO2004100479A1 (en) | 2003-05-05 | 2004-04-30 | Method and apparatus for synchronizing a multi-level modulation signal |
Publications (1)
Publication Number | Publication Date |
---|---|
BRPI0410013A true BRPI0410013A (pt) | 2006-04-25 |
Family
ID=33435146
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0410036-0A BRPI0410036A (pt) | 2003-05-05 | 2004-04-24 | aparelho e método para uso em decodificação iterativa |
BRPI0410010-7A BRPI0410010A (pt) | 2003-05-05 | 2004-04-24 | aparelho e método para decodificação em um sistema de modulação hierárquico |
BRPI0410013-1A BRPI0410013A (pt) | 2003-05-05 | 2004-04-30 | método e aparelho para sincronizar um sinal de modulação com múltiplos nìveis |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0410036-0A BRPI0410036A (pt) | 2003-05-05 | 2004-04-24 | aparelho e método para uso em decodificação iterativa |
BRPI0410010-7A BRPI0410010A (pt) | 2003-05-05 | 2004-04-24 | aparelho e método para decodificação em um sistema de modulação hierárquico |
Country Status (8)
Country | Link |
---|---|
US (1) | US7464318B2 (pt) |
EP (3) | EP1620984B1 (pt) |
JP (3) | JP4642753B2 (pt) |
KR (3) | KR101051213B1 (pt) |
CN (3) | CN1784878A (pt) |
BR (3) | BRPI0410036A (pt) |
DE (1) | DE602004016312D1 (pt) |
WO (3) | WO2004100478A2 (pt) |
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BRPI0410036A (pt) * | 2003-05-05 | 2006-04-25 | Thomson Licensing | aparelho e método para uso em decodificação iterativa |
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US7386056B2 (en) | 2003-11-26 | 2008-06-10 | Delphi Technologies, Inc. | Method to increase performance of secondary data in a hierarchical modulation scheme |
US7230998B2 (en) | 2003-11-26 | 2007-06-12 | Delphi Technologies, Inc. | Method to increase performance of secondary data in a hierarchical modulation scheme |
US20050113040A1 (en) | 2003-11-26 | 2005-05-26 | Walker Glenn A. | Method to minimize compatibility error in hierarchical modulation using variable phase |
US7215713B2 (en) | 2003-11-26 | 2007-05-08 | Delphi Technologies, Inc. | Method to minimize compatibility error in hierarchical modulation |
US7230992B2 (en) | 2003-11-26 | 2007-06-12 | Delphi Technologies, Inc. | Method to create hierarchical modulation in OFDM |
US7499696B2 (en) | 2003-11-26 | 2009-03-03 | Delphi Technologies, Inc. | Method to optimize hierarchical modulation for a diversity system |
ES2300748T3 (es) * | 2004-02-19 | 2008-06-16 | Thomson Licensing | Metodo y aparato para recuperacion de portadora en un sistema de comunicaciones. |
US7516390B2 (en) * | 2005-01-10 | 2009-04-07 | Broadcom Corporation | LDPC (Low Density Parity Check) coding and interleaving implemented in MIMO communication systems |
US7660368B2 (en) | 2005-01-11 | 2010-02-09 | Qualcomm Incorporated | Bit log likelihood ratio evaluation |
CN101945080B (zh) * | 2005-01-11 | 2012-11-14 | 高通股份有限公司 | 用于在一分层调制系统中解码数据的方法和装置 |
US7830983B2 (en) | 2005-03-01 | 2010-11-09 | Delphi Technologies, Inc. | Method to minimize degradation in a D-MPSK hierarchical modulation system |
KR100660056B1 (ko) * | 2005-11-07 | 2006-12-20 | 한국전자통신연구원 | 계층적 변조 신호의 독립적 스트림 추출 및 연판정 장치 및그 방법 |
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KR100886799B1 (ko) * | 2006-12-06 | 2009-03-05 | 한국전자통신연구원 | 지상파 디지털 멀티미디어 방송의 계층적 변조 방법 및장치 |
DE102007053091A1 (de) * | 2007-11-07 | 2009-05-14 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren und Vorrichtung zur Decodierung von faltungscodierten Signalen |
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KR100903877B1 (ko) * | 2007-12-13 | 2009-06-24 | 한국전자통신연구원 | 디지털 방송 시스템에서 신호 수신 장치 및 방법 |
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US20120272113A1 (en) * | 2011-04-19 | 2012-10-25 | Cambridge Silicon Radio Limited | Error detection and correction in transmitted digital signals |
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RU2013125784A (ru) * | 2013-06-04 | 2014-12-10 | ЭлЭсАй Корпорейшн | Устройство для обработки сигналов, переносящих кодированные с модуляцией биты четности |
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WO2016056395A1 (ja) * | 2014-10-06 | 2016-04-14 | ソニー株式会社 | 受信装置、受信方法、およびプログラム |
JP6456564B2 (ja) * | 2016-09-01 | 2019-01-23 | 三菱電機株式会社 | 尤度生成装置、受信装置、尤度生成方法および光伝送システム |
CN106452645B (zh) * | 2016-10-26 | 2018-11-23 | 西安空间无线电技术研究所 | 一种基于跨层设计的星群网络时间同步方法 |
JP6633252B2 (ja) * | 2017-06-27 | 2020-01-22 | 三菱電機株式会社 | 尤度生成装置 |
CN107786892B (zh) * | 2017-10-27 | 2020-01-14 | 深圳Tcl数字技术有限公司 | 一种播出数字电视的方法、装置及可读存储介质 |
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JP2002111768A (ja) * | 2000-09-26 | 2002-04-12 | Sony Corp | デジタル衛星放送復調装置及び方法 |
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JP3506330B2 (ja) * | 2000-12-27 | 2004-03-15 | 松下電器産業株式会社 | データ送信装置 |
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BRPI0410036A (pt) * | 2003-05-05 | 2006-04-25 | Thomson Licensing | aparelho e método para uso em decodificação iterativa |
-
2004
- 2004-04-24 BR BRPI0410036-0A patent/BRPI0410036A/pt not_active IP Right Cessation
- 2004-04-24 JP JP2006514253A patent/JP4642753B2/ja not_active Expired - Fee Related
- 2004-04-24 CN CNA200480012039XA patent/CN1784878A/zh active Pending
- 2004-04-24 BR BRPI0410010-7A patent/BRPI0410010A/pt not_active IP Right Cessation
- 2004-04-24 KR KR1020057021037A patent/KR101051213B1/ko not_active IP Right Cessation
- 2004-04-24 DE DE602004016312T patent/DE602004016312D1/de not_active Expired - Lifetime
- 2004-04-24 US US10/554,580 patent/US7464318B2/en active Active
- 2004-04-24 EP EP04751222A patent/EP1620984B1/en not_active Expired - Lifetime
- 2004-04-24 CN CNB2004800121585A patent/CN100512244C/zh not_active Expired - Fee Related
- 2004-04-24 WO PCT/US2004/013735 patent/WO2004100478A2/en active Application Filing
- 2004-04-24 KR KR1020057020943A patent/KR20060010780A/ko not_active Application Discontinuation
- 2004-04-24 EP EP04751224A patent/EP1620987A2/en not_active Ceased
- 2004-04-24 WO PCT/US2004/013733 patent/WO2004100475A2/en active Application Filing
- 2004-04-24 JP JP2006514254A patent/JP4603536B2/ja not_active Expired - Fee Related
- 2004-04-30 KR KR1020057020978A patent/KR20060010781A/ko not_active Application Discontinuation
- 2004-04-30 JP JP2006514226A patent/JP4516959B2/ja not_active Expired - Fee Related
- 2004-04-30 BR BRPI0410013-1A patent/BRPI0410013A/pt not_active IP Right Cessation
- 2004-04-30 WO PCT/US2004/013647 patent/WO2004100479A1/en active Application Filing
- 2004-04-30 EP EP04751170A patent/EP1620986A1/en not_active Withdrawn
- 2004-04-30 CN CN2004800123241A patent/CN1784877B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1620987A2 (en) | 2006-02-01 |
EP1620984A2 (en) | 2006-02-01 |
US7464318B2 (en) | 2008-12-09 |
KR20060010781A (ko) | 2006-02-02 |
JP4642753B2 (ja) | 2011-03-02 |
WO2004100475A3 (en) | 2005-01-13 |
BRPI0410036A (pt) | 2006-04-25 |
JP4603536B2 (ja) | 2010-12-22 |
US20060212776A1 (en) | 2006-09-21 |
WO2004100475A2 (en) | 2004-11-18 |
CN1784877B (zh) | 2012-09-26 |
CN1784875A (zh) | 2006-06-07 |
WO2004100478B1 (en) | 2005-07-14 |
KR101051213B1 (ko) | 2011-07-21 |
JP4516959B2 (ja) | 2010-08-04 |
CN100512244C (zh) | 2009-07-08 |
CN1784878A (zh) | 2006-06-07 |
WO2004100478A3 (en) | 2005-05-19 |
KR20060010780A (ko) | 2006-02-02 |
WO2004100479A1 (en) | 2004-11-18 |
KR20060054179A (ko) | 2006-05-22 |
JP2006527532A (ja) | 2006-11-30 |
EP1620984B1 (en) | 2008-09-03 |
JP2006525767A (ja) | 2006-11-09 |
BRPI0410010A (pt) | 2006-04-25 |
EP1620986A1 (en) | 2006-02-01 |
JP2006525763A (ja) | 2006-11-09 |
CN1784877A (zh) | 2006-06-07 |
DE602004016312D1 (de) | 2008-10-16 |
WO2004100478A2 (en) | 2004-11-18 |
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